LIGHT EMITTING DIODE ILLUMINATING APPARATUS WITH SAME-TYPE LIGHT EMITTING DIODES

• US 20100001299A1
• Filed: 06/22/2009
• Published: 01/07/2010
• Est. Priority Date: 07/01/2008
• Status: Abandoned Application

• Current Assignee: Advanced Optoelectronic Technology, Inc.
• Original Assignee: Advanced Optoelectronic Technology, Inc.
• Inventors: CHANG, CHUNG-MIN, HSU, CHIH-PENG, WANG, CHUN-WEI
• Application Number:
  US12/488,715
• Publication Number:
  US 20100001299A1
• Time in Patent Office: Days
• US Class Current: 257/89
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/50 Wavelength conversion elements

Abstract

A light emitting diode illuminating apparatus for emitting colorful light includes a substrate, a first lighting element, a second lighting element, a third lighting element. The first, second and third lighting elements are juxtaposed at the substrate. The first lighting element includes a first LED chip, and a first filling layer encapsulating it. The first filling layer includes red phosphor generally evenly doped therein. The second lighting element includes a second LED chip and a second filling layer encapsulating it. The third lighting element includes a third LED chip and a third filling layer encapsulating it. All of the first, the second and the third LED chips are the same kind of LED chip selected from the group consisting of GaN LED chips, AlGaN LED chips and InGaN LED chips. Light emitting from the filling layers are capable of mixing to produce light of a uniform color.

Claims

1. A light emitting diode (LED) illuminating apparatus comprising:

a substrate;

a first lighting element being juxtaposed at the substrate, the first lighting element comprising a first LED chip, and a first filling layer encapsulating the first LED chip, the first filling layer including red phosphor generally evenly doped therein;

a second lighting element being juxtaposed at the substrate, the second lighting element comprising a second LED chip, and a second filling layer encapsulating the second LED chip; and

a third lighting element being juxtaposed at the substrate, the third lighting element comprising a third LED chip, and a third filling layer encapsulating the third LED chip;

wherein all of the first LED chip, the second LED chip, and the third LED chip are the same kind of LED chip selected from the group consisting of gallium nitride (GaN) LED chips, aluminum gallium nitride (AlGaN) LED chips and indium gallium nitride (InGaN) LED chips;

light emitted from the first filling layer, the second filling layer, and the third filling layer are capable of mixing to produce light of a uniform color.

2. The light emitting diode illuminating apparatus of claim 1, wherein the first LED chip and the second LED chip are green LED chips;

the third LED chip is a blue LED chip.

3. The light emitting diode illuminating apparatus of claim 1, wherein the first LED chip, the second LED chip, and the third LED chip are blue LED chips;

the second filling layer comprises at least one of green phosphor and yellow phosphor generally evenly doped therein.

4. The light emitting diode illuminating apparatus of claim 1, wherein the first LED chip, the second LED chip, and the third LED chip are UV LED chips;

the second filling layer comprises at least one of green phosphor and yellow phosphor generally evenly doped therein;

the third filling layer comprises blue phosphor generally evenly doped therein.

5. The light emitting diode illuminating apparatus of claim 1, wherein the first LED chip and the second LED chip are UV LED chips;

the third LED chip is a blue LED chip;

the second filling layer comprises at least one of green phosphor and yellow phosphor evenly doped therein.

6. The light emitting diode illuminating apparatus of claim 5, wherein a size of the first LED chip is greater than that of one of the second LED chip and the third LED chip.

7. The light emitting diode illuminating apparatus of claim 1, wherein the first LED chip, the second LED chip, and the third LED chip each comprises a separate driving circuit.

8. The light emitting diode illuminating apparatus of claim 1, wherein the substrate comprises a first recess, a second recess, and a third recess are located in juxtaposed manner;

the first LED chip, the second LED chip, and the third LED chip are positioned on surfaces of the substrate at the bottoms of the first recess, the second recess, and the third recess, respectively.

9. The light emitting diode illuminating apparatus of claim 8, further comprising an annular reflective member positioned on the substrate to surround the first, second, and third recesses;

the reflective member has an inner surface to reflect light emitted from the first, second, and third filling layers.

10. The light emitting diode illuminating apparatus of claim 9, wherein the inner surface has a stepped configuration or comprises at least two consecutive portions having different gradients.

11. The light emitting diode illuminating apparatus of claim 9, further includes a light scattering layer positioned in the reflective member to cover the first, second, and third filling layers, and the light scattering layer comprises a plurality of scattering particles evenly distributed therein.

12. A light emitting diode illuminating apparatus comprising:

a substrate;

a first lighting element being juxtaposed at the substrate, the first lighting element comprising a first LED chip, and a first filling layer encapsulating the first LED chip, the first filling layer including red phosphor generally evenly doped therein; and

a second lighting element being juxtaposed at the substrate, the second lighting element comprising a second LED chip, and a second filling layer encapsulating the second LED chip, the second filling layer including two different phosphor materials respectively doped therein;

wherein both of the first LED chip and the second LED chip are the same kind of LED chip selected from the group consisting of GaN LED chips, AlGaN LED chips and InGaN LED chips;

light emitted from the first filling layer and the second filling layer are capable of mixing to produce light of a uniform color.

13. The light emitting diode illuminating apparatus of claim 12, wherein the first LED chip and the second LED chip are UV LED chips;

the second filling layer comprises at least one of blue phosphor, green phosphor and yellow phosphor generally evenly doped therein.

14. The light emitting diode illuminating apparatus of claim 12, wherein the first LED chip and the second LED chip are blue LED chips;

the second filling layer comprises green phosphor and yellow phosphor generally evenly doped therein.

15. The light emitting diode illuminating apparatus of claim 12, wherein the first LED chip and the second LED chip each comprises a separate driving circuit.

16. The light emitting diode illuminating apparatus of claim 12, wherein the substrate comprises a first recess and a second recess are located in juxtaposed manner, the first LED chip and the second LED chip are positioned on surfaces of the substrate at the bottoms of the first recess and the second recess, respectively.

17. The light emitting diode illuminating apparatus of claim 16, further comprising an annular reflective member positioned on the substrate to surround the first and second recesses, the reflective member has an inner surface to reflect light emitted from the first and second filling layers.

18. The light emitting diode illuminating apparatus of claim 17, wherein the inner surface has a stepped configuration or comprises at least two consecutive portions having different gradients.

19. The light emitting diode illuminating apparatus of claim 17, further comprising a light scattering layer positioned in the reflective member to cover the first and second filling layers, and the light scattering layer comprises a plurality of scattering particles evenly distributed therein.